Calcium hydroxide is slightly soluble in water with a Ksp of 1.3×10−6. What is the pH of a saturated solution of calcium hydroxide at 25° C?

s=1.3×10−643=6.87×10−3OH−=2s⇒ pH=12.14

Calcium hydroxide is slightly soluble in water with a Ksp of 1.3×10−6. What is the pH of a saturated solution of calcium hydroxide at 25° C?

s=1.3×10−643=6.87×10−3OH−=2s⇒ pH=12.14

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Calcium hydroxide is slightly soluble in water with a $K_{s p}$ of $1.3 \times 10^{- 6}$ . What is the pH of a saturated solution of calcium hydroxide at 25° C?

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12.34

12.14

12.04

11.84

answer is B.

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Detailed Solution

$\begin{array}{l} s = \sqrt[3]{\frac{1.3 \times 10^{- 6}}{4}} = 6.87 \times 10^{- 3} \\ [{OH}^{-}] = 2 s \\ \Rightarrow pH = 12.14 \end{array}$

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Calcium hydroxide is slightly soluble in water with a Ksp of 1.3×10−6. What is the pH of a saturated solution of calcium hydroxide at 25° C?

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Calcium hydroxide is slightly soluble in water with a $K_{s p}$ of $1.3 \times 10^{- 6}$ . What is the pH of a saturated solution of calcium hydroxide at 25° C?